Bobbin stripper



k f q LLL. Cr

E. A. TERRELL BOBBIN STRIPPER Aug. 29, 1933.

' Filed Dec.

14, 1931 2 Sheets-Sheet l INVENTOR. LGQ Q- ulQ BY MS KW,

A TTORNEY.

1933. E. A. TERRELL 1,925,062

BOBBIN STRIPPER Filed D 14, 1931 2 Sheets-Sheet 2 113 A39 157: 103 m 183 161 145 I 173 as .90 97 9.3 1&9 I

A TTORNEY.

Patented Aug. 29, 1933 szsrez r we I BOBBIN STEIPPER Edgar A. Terrell, Charlotte, N. (7., assignor to The Terrell Machine Company, Charlotte, N. (3., a corporation of North Carolina Application December 14, 1931 Serial No. 589,899

20 Claims.

The invention relates to bobbin-strippers of the general character disclosed in my Patent No. 1,740,128, dated December 17, 1929, and its broad object is to provide improved means for feeding or controlling the mov ment of bobbins for stripping; or as more particularly stated, principal purpose is to provide impro ernents in mechanism for operating a device in the nature of a p oger, which cooperates with the successive ho, oins to permit the lowermost one to enter its initial stripping position and to hold bacl: the rest, or s such lowermost bo bin from a pre nary position to initial stripping position, and also serves to maintain it in proper during at least a part of the stripping action.

The principal improvement consists, as briefly described, in plunger operating means which is functionally independent of other parts of the machine, such as the stripping-bladaoperating elements, and which moves the plunge to act upon the bobbin well in advance of the movement of the blades to their active stripping position about the bobbin-barrel, and which is adapted to be applied to existing types of bobbin-strippers to replace earlier plunger-devices without need for fitting, and with ease and simplicity.

In the patented structure, a main shaft is connected to drive, at a lower s eed, other shafts which operate, respectively, a push-head and a pull-head; the bobbins descend by gravity in an arcuate feed-chute toward stripping blades arranged to move convergently to engage about the bobbin-barrel; the head of a bobbin is located on supports adjacent the blades, while its tip is held in a yieldable detent or tip-support just above a tip-socket on the push-head; while the pushhead is in retracted position, and before it advances in a stripping action, and while the blades are advancing the movement of the bobbin to initial stripping position is completed by a plunger which moves horizontally and perpendicularly to the bobbin axis, and has a beveled face which engages the bobbin-barrel, forcing the tip downward out of the tip-support and into the soclzet on the push-head; the blades then complete their movement, to engage about t -e barrel in proper positions to strip the waste therefrom; the push-head advances, engaging the bobbintip and moving it forward in relation to the blades, and bobbin movement and the stripping action are completed by the pull-head. In the patented machine, also, the sripping blades at each side of the machine are operated by arms on Lt roclrshaft which is oscillated by a cam on the position in relation to the stripping elements,

shaft wh sh drives the push-head, and the plun-.

1 ger above referred to is also operated by a generally similar arm on one of the rocksnafts; since the total duration of movement of this rockshaft available for moving the blades to stripping position and for moving the plunger to act upon the bobbin-barrel for the purpose described, corresponds to only a small part of one complete machine cycle, and itself comprises a relatively small part of one revolution, it is possible to move the plunger only moderately in advance I" the blades, although lead of plunger movement is somewhat by making its driving-arm longer than the arms which operate the blades. Consequently in some cases the downward movement of the bobbinbarrei produced by plunger action is insufficient, or may be delayed to such an extent that the upper corners of the convergently-rnoving blades engage the barreland dent or out it, or the barrel may be gripped by the blades in such manner that it is prevented from completing its movement to stripping position, and a faulty stripping action may ensue, with further damage to the bobbin, injury or derangement of the blades,

etc., as will be understood by skilled persons without further explanation.

The invention obviates the stated difiiculties or disadvantages, by providing plunger-moving means which is in an operative sense independent socket, While the blades are in fully retracted posichine is running at full speed this causes the bobbins to descend practically horizontally instead of causing a definitely observable tilt resulting from the descent of the head as the stripping blades open and thus withdraw their support, followed by "the later descent of the tip. There is, of course, probably an earlier descent by the head even when the plunger is functioning in this manner, but it can be so adjusted that it does not cause the vibration, among the bobbins which are following it in the feed chute, that is sometimes caused by the plunger action in the patented structure, and which interferes, more or less, with proper bobbin feeding. This timing of the plunger also insures that the bobbin-tip will be pressed downward into the push-head socket before the stripping blades close around the bobbin-barrel.

Another characteristic and advantage of the improved mechanism and preferred mode of operation is that the plunger remains in its inward position during the forward stroke of the push-head, and prevents any tendency of the bobbin-tip to rise in the push-head socket as it moves forward. Such a tendency may also be overcome, or limited, by beveling the pushing face downward and rearward, as here shown as a feature of the invention, so that the bobbin-tip contacts with an inclined plane instead of one which is vertical, and the reaction to the impelling force urges the tip downward in its socket.

As more particularly described, with reference to the present physical embodiment of the invention, the plunger is connected to a cam-operated arm or lever structure which is mounted for oscillation independently of the cam and rockshaft which move the blade-arms. By this arrangement the plunger-earn makes a complete revolution in each machine-cycle so that plungeradvance may commence at any selected moment in the cycle, and if desired, before blade-advance begins; and plunger movement and positioning of the bobbin may be completed before the blades reach stripping position, and the plunger may be retained in position to hold down the bobbin in the push-head, avoiding possibility of premature contact of the blades with the bobbin and the other limitations of the patented structure, as sufficiently referred to above. The cam may also be adjusted angularly in relation to its driving means through a wide range, permitting any necessary or desired variation in timing of the plunger movement.

Fig. 1 is a plan view of a bobbin-stripper, embodying the invention in one form.

Fig. 2 is a partial side elevation, enlarged, showing the portion of the machine including all the invention mechanism and some adjacent parts.

Fig. 3 is a vertical section at 3-3, Fig. 2.

Fig. 4 is a horizontal section at 44, Fig. 3.

Fig. 5 is a diagram, in elevation, in a transverse plane of the machine, explaining the action of the plunger in relation to the stripping blades and tip-support.

Fig. 6 is a'view in section in the vertical, axial plane of the push-socket, showing the plunger, the push-head, tip-socket, improved arrangement of tip-pushing face, and principal adjacent parts.

Fig. 7 is a detail view of the plunger-operating cam and its follower.

The machine frame (Fig. 1) has longitudinal side-members 1 providing guides 3 for a reciprocating push-head 5 and other guides '7 for a reciprocating pull-head 9. A transverse shaft 11 in bearings 13, near the rear end of the machine (the left end as viewed in Fig. 1) has a crank 15 connected by a pitrnan 17.120 drive the pushhead, and a transverse shaft 19 in bearings 21 at the forward end of the frame is connected by a crank 23 and pitman 25 to reciprocate the pullhead. A longitudinal main driving shaft 27 supported in bearings 29 has pinions 31 and 33 engaging gears 35 and 37 on the transverse shafts 11 and 19 respectively, to drive these shafts simultaneously at equal speeds, and usually at a (i w eaaoez sired slower speed than that of the main shaft. The machine is driven by a belt or a pulley 39 through a clutch 41 on the rearward end of the main shaft, or in any other convenient way.

The push-head 5 has a bobbin-tip-socket 43 with a pushing face 45 at its rearward end, to engage the bobbin-tip and advance it (toward the right in Fig. l) in the first part of a stripping action, and pull-head 9 has jaws 47 which engage about the bobbin-barrel at the rear of the head and complete the stripping movement.

Guide-blocks 49, Figs. 1 and 2, are secured on the frame side-members, and these support and guide the narrow stripping blades 51 and wider blades 53 for reciprocation toward and from the bobbin. The guide-blocks also have, close to the narrow blades 51, head-supports 55 to receive the bobbin-head in stripping position, and downwardly convergent guide-flanges or edges 5'? cooperating with the bobbin-barrel, or its fillet, adjacent the head to assist in positioning the bobbin.

The bobbins are guided toward stripping position in a feed-chute 59 (Figs. 2, 3 and 6) including spaced side-plates 61 having arcual'te head-guiding rails 63, a head-guard 65 and a guide 6'7 projecting below the guard to direct the bobbin-heads therefrom to the supports 55, and to position the bobbin longitudinally, in cooperation with the guide-edges 5'? above referred to. The 67 is not shown in the cited patent, but fully illustrated and described in my application filed August 21, 1931, Serial No. 558,530.

The bases of side-p ates 61 of the chuterest on the frame side-r ibers 1 and are secured thereto by scr-ws 69 passing through the baseflanges 71 and engaging in holes '73 in the framemembers; the screw-apertures in the flanges are in the form of longltudinally-directed slots, so that the entire chute structure may be adjusted udinally o the frame, thus to properly pos1t.on the bobbln' delivered from the chute in relation to the stripping blades, head-supports 55 and guide-edges 57, and also in accordance with variations in bobbin l ngth, head-form or dimensions, etc.

The tip-support above mentioned, in which the bobbin-tip is held before movement by plunger action to the push-head socket 43, as here shown, consists of strips '75 of spring sheet-metal, secured to lugs 77 extending from the arcuate bobbin-barrel guide-rails 79 located within the chute side-plates, as fully disclosed in my application Serial No. 558,530, referred to above; the lower ends 81 of the two opposite spring-strips are curved convergently, providing a socket to receive the bobbin-tip. The tip-support shown in the cited patent is specifically different, but acts in cooperation with a plunger and the bobbin-tip, in a substantially similar manner.

The plunger 33 (early above referred to, for displacing the bobbin-tip from the tip-support and moving it into the push-socket 43 (is mounted for reciprocation in a sleeve 85 at the lower end of l a bracket 87, which is secured to one of the chute side-plates 61 by screws 89; the screw-apertures in the bracket are in the form of vertically directed slots 91 permitting vertical adjustment of the bracket and positioning of the plunger in accordance with bobbin-barrel diameter, or for other reasons.

The inner end of the plunger has a downward and outwardly slanting face 93 to engage a bobbimbarrel and by angular reaction force it downward to discharge its tip from the tip-support; and preferably, also, the upper face of the inward end is flattened off as at 95 to enable th end edge 97 to run easily under the next-upper bobbin as the plunger advances.

The stripping blades are advanced and retracted by arms 99 and 101 on longitudinal roclrshaits 103 at opposite sides of the machine, supported in bearings 105 connected to frame-members 1. At its rearward end, each r cksha'ft has an arm 107 provided with a cam-roll 109 engaging in the cam-channel 111 of a cam-body 113 secured on the rearward transverse crank-shaft 11. Arms 99 and 101 are yieldably connected to their roclshafts, substantially as and for reasons sufficiently explained in the above-mentioned patent and more particularly, in my Patent No. 1,740,127 of December 17, 1929.

In the patented structure, (see Patent No.

1,740,128) the plunger corresponding generally to time in the cycle by cams 113 to advance the '7 stripping blades toward the barrel of a bobbin,

which at this time has its head located on headsupports 55 and its tip in the tip-support 81, the plunger 83 is simultaneously moved toward the bobbin; and while as previously stated, its oper ating arm may be longer than the blade-operating arms, and the plunger may me e somewhat in advance of the blades, its beveled face 93 necessarily acts on the bobbin-barrel to displace the tip downwardly out of the tip-support, after the blades have moved somewhat and while they are still moving convergently; with the result that in some cases the bobbin does not complete its movement to initial stripping position quickly enough to avoid premature engagement by upper corners of the blades, and other difiioulties or disadvantages sui'liciently above referred to.

The invention structure, devised to avoid these difliculties or disadvantages, and to provide means for moving and positioning the bobbintip certainly and accurately, and substantially in advance of the convergent movement of the blades, is now described.

The plunger 83 is moved by arm or lever mechanism which is itself operated independently of the blade-arms 99, 161, or rockshaft 103 at the plunger-driving side of the machine, although the plunger-arm mechanism is conveniently, as here shown, movably supported on said rock-shaft, As best shown in Figs. 2 and 3, a lever 117 has a hub or sleeve 119 mounted for oscillation on rockshaft 193 at the plunger-side of the frazne'. The upper arm 121 of the lever has a laterally-offset end-portion 123, with a longitudinally-directed slot 125, and is chann led on its inward face to receive a rib-formation 127 of a block 129. A screw 131 passes through slot 125 and engages in the block, to secure the latter to the arm and permit adjustment of the block lengthwise of the arm-end, whereby the block may be positioned in accordance with the longitudinal adjustment of the feed-chute on the frame, referred to previously. The upper end of the block is slotted to receive the flattened hook-shaped outer end 133 of the plunger 83, and a pin 135 passes through i he block-end and engages in a vertical slot 137 of the end, to reciprocate the plunger and also to permit vertical adjustment of the plunger, as and for purposes above explained.

Lever 117 also has a lower arm 139 terminating in a sleeve, or eye-formation 141,

Another lever 1 13 has a hub or sleeve 1 15 oscillatably mounted on roclrshaft 103, against hub 119 of lever 117. Lever 143 has an upper arm 1 17 provided with a cam-roll 149, and a lower arm 151 terminating in a sleeve or eye-formation 153 lying against the outward face of the eye 1 11 of lever-arm 139. A rod or belt 155 passes through the aligned apertures of the eyes 141 and 153; its head engages eye 153, and a spring 157 on the belt is adjust-ably compressed between a nut 159 on the bolt-end, and the other eye 141. The spring thus yieldabiy holds the lever-eyes normally in contact, and provides normally for movement of lever 117 in accordance with movement of lever 143, to advance the plunger toward the bobbin. If, however, the bobbin is misplaced, or for any other eason the plunger end engages the bobbin improperly, in a manner causing abnormal resistance to plunger movement, spring 157 is compressed and lever 1 -3 completes its movement under urgency oi itslcain (later described) without furtherv movement of lever 117 or advance of the plunger, thus avoiding injury or breakage of the bobbin or damage, derangement or jamming of the plunger mechanism.

To withdraw the plunger after an inward stroke and retain it and its lever mechanism normally in retracted position, and also to maintain roll 1 19 in contact with its cam, a torsion spring 161 is placed about shaft 103 with one of its ends enin a hole in a lever-hub 145; the other angularly-bent end of the spring is engaged in a hole in a bushing 163, which is rotated on the shaft to impart proper tension to the spring, and secured as by a set-screw 105. The bushing referred to may the head of a sleeve 167, the end of which abuts lever-hub 145, and which passes through and supports the spring.

The care and camriving gearing for operating the lever-mechanism may, in a broader aspect of the invention, be constructed, arranged, or located in various ways. Conveniently, and preferably in a specific sense, as here shown, principal parts, including the cam 203 and elements of the gearing, are located on or about the main drive-shaft 27, which oer-es directly as the driving element of the plunger mechanism. Because the plunger must perform its inward and outward movements for each cycle 1 the machine, while the drive-shaft 27 performs several rotations per machine-cycle, it is necessary to drive the earn 293 through reduction-gearing so designed that the rnalzes one revolution in each machine-cycle, this corresponding to the oneturnper-cycle or" the push-head drive-shaft 11, and enabling the plun er to be operated in desired relation to the blade-movements, and also permitting-a wide range or" cam-adjustment and corresponding control of plunger action.

A bracket 169 secured to frame side-member 1 by screws 171 has a ring-portion 173 encircling main shaft 2'7, adapted to support one or more spur-pini0ns 175, (Fig. 4), to connect a drivingpinion 177 on main shaft 2'? with an internal gear 179, which is revoiuble about the shaft-axis. A single pinion 175 would suffice for this purpose, but a plurality of them, evenly spaced about the permit a division and even distribution of the driving forces, reducing strain and wear on bearings and gear-teeth, etc. Therefore preferably at least two pinions 175 are provided, as shown, located at diametrically opposite sides of the shaft. The pinions are revolubly mounted on stub-shafts 181 secured in bosses 183 formed on bracket-ring 173, Driving-pinion 177 is carried by or formed on a sleeve 185 which is slipped over shaft 27 and secured thereon as by a setscrew 187 engaging the bottom of an annular channel 189 out therein. The sleeve and pinion may thus be rotated 360, or to any less extent about the shaft, for primarily or approximately timing" the plunger action. Engagement of the set-screw with the channel-bottom avoids burring the main surface of the shaft, and the channel by cooperation with the screw-end also affords means for easily locating the sleeve and pinion in approximately correct position longitudinally of the shaft, while permitting moderate movement in such directions, before tightening the screw, when the channel is, as shown, substantially wider than the diameter of the screw-end.

The internal gear 179 above-mentioned is carried by or formed in a flange 191 of a drum or spider 193, which has a-hub or sleeve 195 revolving on a portion of pinion-sleeve 185, between a shoulder 197 ther of and a bushing 199 secured to the end of pinion-sleeve 185, by a set-screw 201.

The plunger-operating cam 203 has a central aperture fitting rcvolubly about the extended hub or sleeve 195 of gear-drum 193, and is secured to rotate with the drum, by a screw 205 passing through a long arcuate slot 207 in the cam and engaging in the drum. The earn-slot permits the cam to be rotated through a wide angle in relation to the gear-drum, thus afiording additional or secondary means for adjusting r timing the plunger ction. The cam has a small concentric portion 209, the arc of which is approximately 90" (more or less), providing a dwell for the plunger in its outward position, a large concentric portion 211 of larger arc, approximately 180, (more or less), providing a dwell for the plunger in its inward position, a rise portion 213 which may be formed to advance the plunger rapidly or to vary its speed in diiferent parts of the advance-movement, and a dropportion 215 controlling or permitting outward movement of the plunger.

Cam-roll 149 of lever 143 runs on the periphery of the cam, being held in engagement therewith by spring 101, as previously mentioned.

The main shaft 27 turns clockwise, as viewed in Fig. 3, and pinion 177 engaging pinions 175 drives them in the opposite direction, thus causing the gear 179 which also engages pinions 175, and cam 203, to rotate counter-clockwise, these directions of movement being indicated by arrows in Fig. 3.

The plunger-drive gearing is designed to revolve cam 203 once in each machine-cycle, as stated, and since main shaft 27 is the primary driving element of this gearing, and also drives the crank-shafts 11 and 19 through pinions 31, 33 and gears 35, 37, the diameter ratio of pinion 177 to internal gear 179 is the same as the ratio of bevel pinions 31, 33 to their gears 35, 37. Specifically, as shown, the drive ratio between main shaft 27 and the crank-shafts is three to one,

and accordingly the drive-ratio of shaft 27 to cam 203 is three to one; or as otherwise stated, the diameter of internal gear 179 is three times that of pinion 177.

As best shown in Fig. 6, an improvement in the initial bobbin-advancing means acting during the stripping action consists in making the push-face 45 of push-head of downward and rearward slanting form, so that the reaction of pressure of this face on the bobbin-tip tends to commencement of the actual stripping operation, push-head 5 is in retracted or rearward position, pull-head 9 is in forward position, the bobbin-head (or the head-rings rests on headsupports 55 (Fig. 6), and the bobbin-tip lies in socket 43 of the push-head, as indicated in dotted lines, Fig. 6; the plunger 83 is in an inward position with its rounded under-face overlying the bobbin-barrel approximately half-way between the head and tip, being held in this position by cam-roll 149 resting on dwell-portion 211 of cam 203; and the blades 51 and 53 have been advanced convergently to substantially enclose and engage the barrel or waste thereon with suitable pressure. Fig. 5 shows in dotted lines a bobbin in the stated position, and also shows in dotted lines the plunger in corresponding position, but the blades as there shown are retracted.

The head of the bobbin in stripping position, as best shown in Fig. 5 and in dotted lines in Fig. 6, now support the head of the one above it, while the barrelof such next upper bobbin rests on the upper flattened face 95 of plunger 83.

Main drive-shaft 27 turning in the direction of the arrow 217, Figs. 3 and 1, rotates shafts 11 and 19 in the directions of arrows 219 and 211, Fig. 1, these two crank-shafts turning at the same speed, which with the gear-ratio above assumed, is one-third that of the main shaft; push-head 5 is moved forward by its crank and pitman 17, whilepull-head 9 is moved rearward (or toward the push-head and the strippers) by its similar crank 23 and pitman 25. In the first small movement of push-head 5 its pushing face engages the bobbin-tip, and the bobbin is pushed axially forward, while upward displacement of its rearward portion is prevented by the rear-sloping face 45 (as above referred to) and by the overlying plunger 83 (either or both). The bobbin is thus accurately constrained to move in proper axial alignment between the stripping blades, which remove the waste as sufiiciently explained in my patent above cited, and as fully understood by persons skilled in the art.

In this stripping movement, also, the next upper bobbin is restrained from moving forward by engagement of its head with the lower portion of guard-strip the bobbin being stripped thus slides under the said next upper one until the head of the latter drops into contact with the barrel of the former bobbin and is slidingly supported upon it. When the tip of the lower bobbin moves from under the head of the next upper one, that head drops to a position of support upon the head-supporting members 55 while the barrel remains supported by the plunger, until the latter is retracted, as more fully explained below.

As the push-head nearly completes its forward stroke, pull-head 9 with its jaws 47 in open position approaches the end of its rearward movement; the head of the bobbin being stripped is thus passed between the pull-jaws, which are closed (in a manner sufiiciently described in the cited patent) and grip about the bobbin-barrel behind the head; in the following forward movement of the pull-head the bobbin is moved inward to complete the stripping action, and discharged by opening of the jaws; in the meantime the push-head returns to rearmost position, ready for another stripping stroke. During this return movement the stripping blades are moved divergently, to open position (Fig. 5) by movement of rock-shafts 103 under control of cams 113, ready to admit between them the next bobbin-barrel for stripping. The plunger 83 is retracted at a suitable time after the tip of the bobbin being stripped has moved substantially forward, and when so retracted, the tip of the bobbin which has been supported by the plunger drops into the tip-support 81. The bobbin next to be stripped is thus supported in a slightly rearward-upwardly inclined position, its head resting on the head-supports 55 and its tip in the tip-socket. The tip must be displaced (by plunger action) from the tip-support downward into the tip-socket 43 of the push-head, before'the blades are moved convergently sufiiciently to engage about the bobbin-barrel. In the machine disclosed in the cited patent, as referred to previously, the plunger is moved by an arm on one of the rockshafts 103, whose arms'99 and 101 also move the stripping blades; the plunger can therefore be moved inward only slightly in advance of the blades, and in some cases the movement of the bobbin-tip into the push-socket is delayed, with the disadvantageous results referred to early above. In the invention structure, in which the plunger-operating mechanism is functionally independent of the blade-operating means, the plunger is moved inward well in advance of the convergent movement of the blades; the slant face 93 of the plunger acts on the bobbin-barrel, and displaces the tip from the tip-support and into the push-socket 43, and

"the blades then complete their convergent movefull explanation of the plunger movements and action of the. plunger-operating mechanism, which now follows:

As above noted, the large-radius or activedwell portion 211 of cam 203 corresponding to inward position of the plunger may be of an arc corresponding to about 180 of rotation of the cam, and therefore to one-half of the complete machine-cycle time, since the cam rotates exactly once in each cycle, being driven from main shaft 27 by gear-elements 117, 175 and 179 at a speed or ratio corresponding to that obtaining as between the main shaft and crank-shafts 11 and '19 and cams 113 of the push-head shaft 11, which cams oscillate the rockshafts 103 and blade-operating arms 99 and 10]. once in each direction in each cycle. As also before-mentioned, the plunger cam may be positioned as desired angularly about shaft 27, by rotary adjustment of pinionsleeve 197 on the shaft, or of the cam itself on the hub of gear 1'79, or both, so that the riseportion 213 of cam 203 may be brought to bear upon follower 149 to advance the plunger, at any point in the cycle. A preferred adjustment is such that the plunger starts to move inward at about the moment when the blades are fully separated, or at least before they commence the ensuing convergent movement. This insures that the bobbin-tip is positively moved or pressed downward into the push-head socket before the stripping blades close about the barrel. With this adjustment, also, when the machine is running at full speed, the bobbins are caused to descend from the feed-chute practically horizontally, or at least without a definitely observable tilt, resulting from a descent of the head, followed by a later descent of the tip, as usually occurs in the patented structure. There is probably, when the plunger is functioning in the manner stated, actually an earlier descent of the head, followed by descent of the tip, but the action is such as to avoid agitation or vibration of bobbins following, in the feedechute, and which interferes with smooth or accurate movement of the bobbins to stripping position.

The plunger may then be retained in active position, by cam-roll 149 in engagement with the large or active dwell portion 211 of cam 203, for a time equal to about one-half the machinecycle, or at least during the complete forward stroke of the push-head, thus preventing any tendency of the bobbin to rise in the push-head socket as it moves forward.

Thereafter, the drop portion 215 of cam 203 encounters cam-roll 149 and the plunger is retracted by action of spring 161, ready for another inward movement in the next cycle.

While I have illustrated and described a certain form in which the invention may be embodied, I am aware that many modifications may be made therein by any person skilled in the art,

without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited to the particular forms shown, or to the details of construction thereof, but

What I do claim is:-

1. A bobbin-stripper having in combination a feed-chute, stripping elements, operating means therefor, a detent arranged to support a bobbintip adjacent stripping position, a feed element cooperating with bobbins while their tips are supported by the detent, and operating means for said feed element actuated independently of said strippingeelement-operating means.

2. A bobbin-stripper comprising a feed-chute, stripping blades to engage a bobbin in stripping position, blade-operating means, abobbin-tipsupport, and mechanically operated means for moving a bobbin-tip from the tip-support to stripping position prior to a movement of the blades toward bobbin-engaging position.

3. A bobbin-stripper comprising a feed-chute, stripping blades, blade-operating means, means for advancing a bobbin in a stripping action, a bobbin-tip-support, a member movableto engage a bobbin and move it from the tip-support into range of the advancing means, and means for moving said member independently of the action of said blade-operating means.

4. A bobbin-stripping machine having in combination a feed-chute, stripping blades, blade-.

5. A bobbin-stripping machine having in combination a feed-chute, stripping blades, bladeoper-ating means, a push-head, a bobbin-tip-support, a plunger operable to move bobbin-tips from the support to the push-head, a cam, and plunger-operating means intermediate the cam and the plunger including an element yieldable upon obstruction of plunger-movement.

6. A bobbin-stripping machine having in com bination a feed-chute, a push head having a bobbin-tip-socket, stripping blades movable toward and from the barrel of a bobbin positioned for stripping, blade-operating means, a tip-support yieldably maintaining a bobbin-tip above the tipsocket, an element cooperating with the bobbinbarrel to move its tip from the tip-support to the socket, and means independent of said blade-operating means for operating said element.

7. A bobbin-stripping machine having in combination a feed-chute, a push-head having a bobbin-tip-socket, stripping blades movable toward and from thebarrel of a bobbin positioned for stripping, blade-operating means, a tip-support disengageably maintaining a bobbin-tip adjacent the tip-socket, an element cooperating with the bobbin-barrel to move its tip from the tip-support to the socket, and mechanically operated means for moving said element to effect such bobbin movement while the blades are in a retracted position, and to retain said element in advanced position overlying the bobbin-barrel and maintaining the tip in the tip-socket during the active stroke of the push-head.

8. A bobbin-stripping machine having in combination a feed-chute, stripping blades movable convergently to engage about a bobbin-barrel, rockshafts and arms thereon connected to move the blades, a push-head having a bobbin-tipvsocket, a shaft connected to reciprocate the pushhead, means operated by said shaft to oscillate the rockshafts, a tip-support disengageably supporting a bobbin-tip above the push-head socket, a member movable to engage the bobbin-barrel and displace its tip from the tip-support to the push-head socket, and means for mechanically operating said memberto efiect the stated bobbin movement in advance of convergent movement of the blades.

9. A bobbin-stripping machine having in combination a feed-chute, stripping blades movable convergently to engage about a bobbin-barrel, rockshafts and arms thereon connected to move the blades, a push-head having a bobbin-tipsocket, a shaft connected to reciprocate the pushhead, means operated by said shaft to oscillate the rockshafts, a tip-support.disengageably supporting a bobbin-tip above the push-head socket, a member movable to engage the bobbin-barrel and displace its tip from the tip-support to the push-head socket, and mechanical actuating means for said member functionally independent of said rockshafts.

10. A bobbin-stripping machine having in combination a feed-chute, stripping blades movable convergently to engage about a bobbin-barrel, rockshafts and arms thereon connected to move the blades, a push-head having a bobbintip-socket, a shaft connected to reciprocate the push-head, means operated by said shaft to oscillate the rockshafts, a tip-support disengageably supporting a bobbin-tip above the push-head socket, a plunger movable to engage a bobbinbarrel and displace its tip from said tip-support into said push-head socket, another driving shaft, and means actuated thereby to move the-plunger and effect the stated bobbin movement.

11. A bobbin-stripping machine having in combination a feed-chute, stripping blades movable convergently to engage about a bobbin-barrel, rockshafts and arms thereon connected to move the blades, a push-head having a bobbin-tipsocket, a shaft connected to reciprocate the pushhead, means operated by said shaft to oscillate the rockshafts, a tip-support disengageably supporting a bobbin-tip above the push-head socket, a member movable to engage the bobbin-barrel and displace its tip from the tip-support to the push-head socket, a cam and a cam-follower connected to operate the member, and means for driving the cam.

12. A bobbin-stripping machine having in combination a feed-chute, stripping blades movable convergently to engage about a bobbin-barrel, rockshafts and arms thereon connected to move the blades, a push-head having a bobbin-tipsocket, a shaft connected to reciprocate the pushhead, means operated by said shaft to oscillate the rockshafts, a tip-support disengageably supporting a bobbin-tip above the push-head socket, a member movable to engage the bobbin-barrel and displace its tip from the tip-support to the push-head socket, a cam and a cam-follower connected to operate the member, means for driving the cam, and means for revolubly adjusting the cam in relation to its driving means.

13. In a bobbin-stripping machine including a f eed-chute, stripping blades, a push-head, a pushhead driving shaft, rockshafts operated by said driving shaft, arms on the rockshafts connected to operate the blades, a main driving shaft connected to operate the push-head-driving shaft, a tipsupport arranged to support a bobbin-tip adjacent the push-head when the latter is in a position preliminary to a bobbin-advancing movement, and a plunger movable to engage the barrel of a bobbin whose tip is so supported, in combination therewith, an arm mounted for oscillation and connected to operate the plunger, a cam for operating the arm, and means for driving the cam.

14. In a bobbin-stripping machineincluding a feed-chute, stripping blades, a push-head, a pushhead driving shaft, rockshafts operated by said driving shaft, arms on the rockshafts connected to operate the blades, a main driving shaft connected to operate the push-head-driving shaft, a tip-support arranged to support a bobbin-tip adjacent the push-head when the latter is in a position preliminary to a bobbin-advancing movement, and a plunger movable to engage the barrel of a bobbin whose tip is so supported, in combination therewith, an armmounted for oscillation and connected to operate the plunger, a cam for operating the arm, and means by which the main shaft revolves the cam one turn in each cycle of the machine and means for angularly adjusting the cam in relation to the main shaft.

15. Abobbin-stripping machine having in combination stripping blades, a rockshaft connected to operate the blades, a driving shaft connected to move the rockshaft to and fro once in each machine-cycle, a bobbin-tip-support, a bobbincontrolling plunger mounted for movement to act on a bobbin whose tip is located in said support, and means functionally independent of the rockshaft and operated by said driving shaft to move the plunger to and fro once in each machinecycle.

16. A bobbin-stripping machine having in combination stripping blades, a rockshaft connected to operate the blades, a driving shaft connected to move the rockshaft to and fro once in each machine-cycle, a bobbin-tip support, a bobbincontrolling plunger mounted for movement to act on a bobbin Whose tip is located in said support, a plunger-cam driven from said driving shaft independently of its connection to the rockshaft, and means by which the cam moves the plunger to-and-fro once in each cycle of the machine.

17. A bobbin-stripping machine having in combination stripping blades, a rockshaft connected to operate the blades, a driving shaft connected to move the rockshaft to and fro once in each machine-cycle, a bobbin-tip support, a bobbin-controlling plunger mounted for movement to act on a bobbin Whose tip is located in said support, and means functionally independent of the rcckshaft and operated by said driving shaft to move the plunger to and fro once in each machine-cycle, a plunger-cam driven from said driving shaft, an arm mounted for oscillation independently of said rcckshaft and having a follower actuated by said cam, and an operating connection between said arm and the plunger.

18. A bobbin-stripping machine having in combination, a feed-chute, a push-head, stripping blades, a rockshaft connected to operate the blades, a crank-shaft connected to operate the accommodate the longitudinal adjustment of the chute on the frame.

29. A bobbin-stripping machine having in combination a feed-chute, stripping blades, a push head, and a feed-device mechanically oper ated independently of the stripping blades to feed bobbins one by one from the chute to the push-head, and also acting to hold the bobbins in place in the push-head While pushed by the latter.

EDGAR A. TERRELL. 

